Then, whether you’re working in an Excel sheet or a Word document, the color, font and more will be the same. Set those options in one app and the others immediately pick up the changes. By applying a color, font, effects and background style, you can quickly determine the basic formatting used by most of the Microsoft 365 apps. Themes were added to Microsoft Office a long time ago, but they’re underused, in my opinion. If simple but consistent formatting across Excel, Word, PowerPoint and Outlook are important to your organization, consider designing custom themes that all the apps will use.
How to create and use the same Office themes across files in Microsoft 365